The Drake Equation Calculator

Are we alone in our galaxy?

Astrophysical

R*

Star Formation Rate

10

x

fp

Stars with Planets Ratio

0.45

x

ne

Life Supporting Planets

2

x

Biological

fl

Life Develops Ratio

0.5

x

fi

Intelligent Life Ratio

0.03

x

fc

Broadcasting Ratio

0.25

x

Sociological

l

Years Broadcasting

5000

=

Result

N

Civilizations Currently

10

Astrophysical

R*

Star Formation Rate

fp

Stars with Planets Ratio

ne

Life Supporting Planets

Biological

fl

Life Develops Ratio

fi

Intelligent Life Ratio

fc

Broadcasting Ratio

Sociological

l

Years Broadcasting

The Milky Way Galaxy